ACB 8120 Lecture Notes - Lecture 76: Excitatory Postsynaptic Potential, Axon Hillock, Alar Plate
12 Apr 2020
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Document Summary
Visceral motor (autonomic pre and post ganglionic) Have 1 process that breaks into central and peripheral processes. In drg, central goes into alar plate and peripheral joins up with ventral root to make mixed spinal nerve. Adult neuroblast = g0 phase, no mitosis. Cell body = all regular components of a cell but cannot divide. Nissl = rer to make the nt. Golgi = package the nt to send to the axon terminal. Nucleolus = evidence of high protein manufacturing, site of ribosome. Lipofiscin = brown pigment located in cell bodies of older neurons manufacturing. Receive impulses from tons of other neurons via their axons. Impulses can be - or + (local potential = sum) If reach threshold, ap is fired from axon hillock (all or nothing) Axon hillock - where the ap is fired if threshold is reached. Gaps in myelination = nodes of ranvier (nr) Ap only needs to depolarize the axon at the nr.
